If the composition of dry air at sea level is 78.03% N2, 20.99% O2, and 0.033% CO2 by volume.
1. Determine the average molar mass of this air sample.
2. Determine the partial pressures of O2, N2, and CO2 in atm. (At constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of the gas.)